U.S. patent number 4,682,376 [Application Number 06/893,684] was granted by the patent office on 1987-07-28 for delivery bed.
This patent grant is currently assigned to Landstingens Inkopscentral Lic, Ekonomisk Forening. Invention is credited to Mats Feldt.
United States Patent |
4,682,376 |
Feldt |
* July 28, 1987 |
Delivery bed
Abstract
A delivery bed has a seat part supported on raisable and
lowerable side-pieces. A leg-support has side tubes which are
journalled for axial movement on forwardly and rearwardly located
pairs of support rollers journalled on bolts attached to the
side-pieces. Mounted on the side-pieces are guide bars which
present along the bottom edge surfaces thereof a plurality of
circle-segmental latching recesses intended to co-act with circular
latching flanges on the rearwardly located support rollers in
selected latching positions. The position of the leg-support is
adjusted by lifting the support and axially moving the same to a
desired latching position.
Inventors: |
Feldt; Mats (Liatorp,
SE) |
Assignee: |
Landstingens Inkopscentral Lic,
Ekonomisk Forening (Solna, SE)
|
[*] Notice: |
The portion of the term of this patent
subsequent to October 7, 2003 has been disclaimed. |
Family
ID: |
20358925 |
Appl.
No.: |
06/893,684 |
Filed: |
August 6, 1986 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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786284 |
Oct 10, 1985 |
4615058 |
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Foreign Application Priority Data
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Oct 10, 1985 [SE] |
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8500388 |
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Current U.S.
Class: |
5/602; 5/181;
5/617; D12/132 |
Current CPC
Class: |
A61G
13/0009 (20130101); A61G 13/00 (20130101) |
Current International
Class: |
A61G
13/00 (20060101); A61G 007/00 () |
Field of
Search: |
;5/60,63,69,67,66,80,181,184,62,202 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Murtagh; John E.
Attorney, Agent or Firm: Young & Thompson
Parent Case Text
This application is a division of application Ser. No. 786,284,
filed Oct. 10, 1985, now U.S. Pat. No. 4,615,058.
Claims
I claim:
1. A delivery bed having a raisable and lowerable overlying bed
structure and side-pieces for supporting a seat part and a raisable
back-rest, and further including a frame structure which can be
slidably moved lengthwise of the bed relative to the seat part and
which incorporates an elongated plate-like element intended to form
a leg-support capable of being extended from an inwardly inserted
position to a plurality of extended positions, said frame having
mounted thereon a support roller rotatable about a horizontal axis
perpendicular to the length of the bed, and means on said frame
structure defining a plurality of downwardly opening recesses, said
recesses being spaced apart in a direction lengthwise of the bed
and being selectively individually engageable over said roller in
said plurality of extended positions thereby to support said frame
structure in a selected one of said positions against sliding
movement lengthwise of said frame, said frame structure being
raisable and lowerable relative to said roller to an extent such
that when raised, the frame structure can slide lengthwise of the
bed with said roller out of engagement with all of said recesses,
and when lowered can roll on said roller until said roller enters
one of said recesses.
Description
The present invention relates to a delivery bed of the kind which
comprises an overlying bed structure which can be adjusted to a
number of mutually different positions, and an undercarriage on
which means are provided for supporting the overlying bed structure
and adjusting said structure to a desired height.
The overlying bed structure comprises a centre part, or seat part,
and a back rest which can be raised relative to the seat part.
Slidably arranged beneath the seat part is an elongated, plate-like
leg-support which can be drawn out to varying extents, between a
fully inserted position and a fully extended position, therewith to
form in the main an extension of the seat part.
The overlying bed structure has the form of a steel frame which
incorporates side-pieces, and the leg-support has the form of a
rigid tubular structure, which incorporates side-members and
cross-stays which interconnect said side-members.
Known delivery beds provided with an extensible leg-support
comprise a relatively large number of structural components and bed
manipulating means, which add commensurately to the cost of
manufacturing the bed and which also make the bed more difficult to
clean, when washing the same after use. In certain cases the bed
incorporates movable components which need to be lubricated from
time to time, and also manually operated devices for releasing the
leg-support and locking the same in its adjusted position.
Against this background, the object of the invention is to provide
greatly simplified means for adjusting the leg-support to different
extended positions, while enabling the leg-support to be moved to
and locked in the position to which it is adjusted without needing
to manipulate a particular knob or lever.
This object is achieved with a delivery bed constructed in
accordance with the invention and having the characteristic
features set forth in the following claims.
The leg-support of the delivery bed according to the present
invention can thus be adjusted to and locked in a plurality of
selected positions, which correspond to those positions which might
be required. The leg-support is released quite simply, by grasping
the same and lifting the outwardly end thereof in a manner to move
the latching recess out of engagement with the rearwardly located
support rollers. The leg-support can then be slid comfortably
inwardly or outwardly until reaching the position desired,
whereupon the leg-support is dropped, so as to bring a latching
recess into engagement with the support rollers and therewith lock
the leg-support against axial movement.
These and other characteristic features of the invention will be
described more clearly hereinafter with reference to an exemplary
embodiment of a delivery bed according to the invention illustrated
in the drawings.
FIG. 1 illustrates schematically and in perspective a delivery bed
according to the invention, and shows the back-rest in a raised
position and the leg-support extended;
FIG. 2 is a sectional, schematic side-view of the tubing of the
leg-support, this section being taken on the line 2--2 in FIG.
3;
FIG. 3 illustrates the leg-support as seen from above;
FIG. 4 is a schematic sectional view taken on the line 4--4 in FIG.
5, and illustrates the leg-support and a side-piece;
FIG. 5 illustrates a side part of the leg-support and a side-piece
from above;
FIG. 6 is a detailed view of one rearwardly located support roller
and illustrates a side-piece of the leg-support and its guide bar
in a locked position, and in broken lines in an elevated position,
said side-piece being shown in section; and
FIG. 7 is a detail view of one forwardly located support
roller.
The undercarriage 10 of the bed may be of conventional
construction, incorporating means 11 for supporting the frame of
the overlying bed structure in and adjusting said frame to
different heights and angular positions. The two side-pieces of the
over-lying bed structure support a seat part 14 and a back-rest 15
which can be raised in relation to the seat part. Slidably arranged
beneath the seat part is a leg-support 16.
As illustrated in FIGS. 2 and 3, the leg-support 16 comprises a
frame 17 which incorporates two side tubes 18 interconnected by
cross-stays 19, 20. As shown in FIGS. 6 and 7, the side tubes are
of rectangular cross-section. A plate 21 (FIG. 1) rests on the
frame.
Welded on the inner surfaces of the side tubes are guide bars 22,
the lower edge surfaces of which lie substantially edge-to- edge
with the bottom edges of the guide bars.
Located in the bottom edge surface of the guide bars are
circle-segmental recesses 23, which are operative in latching the
leg-support in its various extended positions and in its fully
inserted position, as described hereinafter.
A stop shoulder 24 defines the maximum limit to which the
leg-support can be extended.
Two handles 25 are provided on the rearwardly located end of the
leg support, for maneuvering said support.
As illustrated in FIGS. 4 and 5, the side-pieces 13 have mounted
thereon a rearwardly located pair of support rollers 26 and a
forwardly located pair of support rollers 27. Only one support
roller of each pair is illustrated in FIG. 5.
The rearwardly located support roller shown in FIG. 6 has a
cylindrical part 28, which forms a support for the side tube 18 in
given positions. The support roller is provided on its outer end
with a guide flange 29, which forms a lateral guide for the side
tube 18 in all positions.
The support roller is provided on its inner end with a circular
latching flange 30, which is intended to engage a respective
latching recess 23 on the guide bar 22.
FIG. 6 illustrates in full lines a latched position in which the
tube 18 rests on the cylindrical part 28 and the flange 30 lies in
one of the recesses 23, so as to latch the leg-support.
A bolt 31 forms a journal shaft for the support roller 26, which
lies between the bolt head 32 and a lock nut 33, which is located
to hold the support roller in a manner which excludes axial play
laterally on the bolt.
The bolt 32 is screwed into a bolt attachment 34, which is welded
to the bottom edge of the side-piece 13. The lateral position of
the support roller can be readily adjusted, by simply screwing the
bolt in or out. The bolt is then locked in position by means of a
lock nut 35. The forward support roller 27 illustrated in FIG. 7 is
substantially similar to the roller 26, but with the difference
that the flange 30 is omitted on the forward roller, so that the
cylindrical part 28a extends right to the end of the roller.
When occupying the latched position illustrated in FIG. 4, a load
can be exerted on the leg-support 16, which will then rest on the
rearwardly located rollers 26. At the same time, the upper sides of
the tubes 18 rest against a support shoulder 36 welded to a
cross-section stay 37 extending between the side-pieces 13. The
shoulder 36 is located somewhat forwardly of the roller 27, as
illustrated in FIG. 4.
In order to safeguard the latched position still further, a
spring-loaded holding means 38 is located on each side-piece and
adapted to exert a spring force on respective side tubes at a
location somewhat forwardly of respective rollers 26.
The leg-support 16 is adjusted to a desired position quite simply
by standing on one or the other side of the leg-support and
grasping the one handle 25 with one hand and lifting the
leg-support so that the latching flanges 30 of the rearwardly
located rollers move out of engagement with respective latching
recesses. In this position the tubes 18 are still guided by the
flanges 29 on the two rollers. The extent to which the leg-support
can be lifted is restricted by slide shoulders 39.
The leg-support can then be pushed-in or drawn-out quickly and
comfortably, to a position in which the selected latching recesses
23 are able to pass into full latching engagement with the latching
flanges of the rearwardly located rollers 26.
The leg-support will lie relatively firmly beneath the seat part,
and the underside of the leg-support is devoid of all bulky
manipulating devices capable of restricting the possibility of
lowering the overlying bed structure to a relatively low height
above the floor. This enables the bed to be adjusted to a position
in which the patient can readily climb into the bed or leave the
bed from one side thereof.
* * * * *